JP2953468B2 - Compound semiconductor device and surface treatment method thereof - Google Patents

Compound semiconductor device and surface treatment method thereof

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Publication number
JP2953468B2
JP2953468B2 JP15933089A JP15933089A JP2953468B2 JP 2953468 B2 JP2953468 B2 JP 2953468B2 JP 15933089 A JP15933089 A JP 15933089A JP 15933089 A JP15933089 A JP 15933089A JP 2953468 B2 JP2953468 B2 JP 2953468B2
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Japan
Prior art keywords
compound semiconductor
treatment method
irregularities
surface treatment
sinx film
Prior art date
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Expired - Fee Related
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JP15933089A
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Japanese (ja)
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JPH0324771A (en
Inventor
雅弘 野口
敏彦 井深
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Mitsubishi Chemical Corp
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Mitsubishi Chemical Corp
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Application filed by Mitsubishi Chemical Corp filed Critical Mitsubishi Chemical Corp
Priority to JP15933089A priority Critical patent/JP2953468B2/en
Priority to US07/546,813 priority patent/US5040044A/en
Priority to KR1019900009103A priority patent/KR0179952B1/en
Priority to DE69008931T priority patent/DE69008931T2/en
Priority to EP90306788A priority patent/EP0404565B1/en
Publication of JPH0324771A publication Critical patent/JPH0324771A/en
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Publication of JP2953468B2 publication Critical patent/JP2953468B2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/005—Processes
    • H01L33/0062—Processes for devices with an active region comprising only III-V compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104—Forming layers
    • H01L21/02107—Forming insulating materials on a substrate
    • H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
    • H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
    • H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
    • H01L21/0217—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon nitride not containing oxygen, e.g. SixNy or SixByNz
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104—Forming layers
    • H01L21/02107—Forming insulating materials on a substrate
    • H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
    • H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
    • H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
    • H01L21/02266—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by physical ablation of a target, e.g. sputtering, reactive sputtering, physical vapour deposition or pulsed laser deposition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104—Forming layers
    • H01L21/02107—Forming insulating materials on a substrate
    • H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
    • H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
    • H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
    • H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104—Forming layers
    • H01L21/02107—Forming insulating materials on a substrate
    • H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
    • H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
    • H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
    • H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
    • H01L21/02274—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition in the presence of a plasma [PECVD]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
    • H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
    • H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
    • H01L21/314—Inorganic layers
    • H01L21/318—Inorganic layers composed of nitrides
    • H01L21/3185—Inorganic layers composed of nitrides of siliconnitrides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
    • H01L33/20—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular shape, e.g. curved or truncated substrate
    • H01L33/22—Roughened surfaces, e.g. at the interface between epitaxial layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/44—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the coatings, e.g. passivation layer or anti-reflective coating

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Led Devices (AREA)
  • Formation Of Insulating Films (AREA)
  • Drying Of Semiconductors (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はIII−Ｖ族化合物半導体装置及びその表面処
理加工方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a III-V compound semiconductor device and a surface treatment method thereof.

〔従来の技術〕 従来、III−Ｖ族化合物半導体、例えばAlGaAs半導体
からなる高輝度発光用LEDとしてホモ接合構造LEDに比べ
て、キャリアの注入効率が高く、高出力、高応答速度が
得られるシングルヘテロ接合構造LED、あるいはダブル
ヘテロ接合構造LEDが用いられている。[Prior art] Conventionally, as a high-brightness light emitting LED made of a group III-V compound semiconductor, for example, an AlGaAs semiconductor, a single carrier having a higher carrier injection efficiency, a higher output, and a higher response speed than a homojunction structure LED is obtained. A hetero-junction structure LED or a double hetero-junction structure LED is used.

これらヘテロ接合構造LEDに特徴的なことは、光取り
出し側にAlAs混晶比Ｘの大きいAlxGa1-xAsが用いられて
いる点である。例えば、赤色発光高輝度LED用基板のエ
ピタキシャル成長の例を示すと、ｐ型GaAs基板〔（10
0）面〕上にｐクラッド層として液相成長法等によりZn
ドープAl0.75Ga0.25As層を200μｍ（ｐ型）形成した
後、ｐアクティブ層としてZnドープAl0.35Ga0.65As層を
２〜３μｍ（ｐ型）形成し、次いでｎクラッド層として
TeドープAl0.75Ga0.25As層を50μｍ程度形成している。
そしてGaAs基板選択性エッチャントを用いて光吸収性Ga
As基板を除去して高輝度LEDチップを得ており、チップ
の表面の混晶比は0.75と高い。このようにAlAs混晶比の
大きなAlxGa1-xAs層は極めて酸化されやすく、そのた
め、発光特性の劣化を招き、素子寿命を著しく短くして
しまう原因となっており、樹脂封止した素子においても
同様であった。What is characteristic of these heterojunction structure LEDs is that Al x Ga 1 -x As having a large AlAs mixed crystal ratio X is used on the light extraction side. For example, when an example of epitaxial growth of a substrate for a red light emitting high-brightness LED is shown, a p-type GaAs substrate [(10
0) plane] as a p-cladding layer on the
After forming a doped Al 0.75 Ga 0.25 As layer of 200 μm (p-type), a Zn-doped Al 0.35 Ga 0.65 As layer is formed as a p-active layer of 2 to 3 μm (p-type), and then as an n-cladding layer.
A Te-doped Al 0.75 Ga 0.25 As layer is formed with a thickness of about 50 μm.
Then, using a GaAs substrate selective etchant, the light absorbing Ga
A high-brightness LED chip is obtained by removing the As substrate, and the mixed crystal ratio on the chip surface is as high as 0.75. As described above, the Al x Ga 1 -x As layer having a large AlAs mixed crystal ratio is extremely easily oxidized, which causes deterioration of the light emission characteristics and significantly shortens the life of the device. The same was true for the device.

この対策としてSiNx膜を形成する方法が提案されてい
る。As a countermeasure, a method of forming a SiNx film has been proposed.

また、表面における全反射を防止して外部量子効率を
上げるため表面に凹凸を設けることも提案されている。It has also been proposed to provide irregularities on the surface to prevent total reflection on the surface and increase external quantum efficiency.

〔発明が解決しようとする課題〕[Problems to be solved by the invention]

しかしながら、従来のものにおいては、表面に凹凸を
設けるか、SiNx膜を形成するかのどちらかしか行われて
おらず、表面に凹凸を設けただけでは耐湿性に問題があ
るとともに、表面の酸化により素子寿命の点で問題があ
り、また単に保護膜としてSiNx膜を設けただけでは付着
強度が弱く、剥がれ易いという問題があった。However, in the conventional device, only the formation of the unevenness on the surface or the formation of the SiNx film is performed, and simply providing the unevenness on the surface has a problem in the moisture resistance and the oxidation of the surface. Accordingly, there is a problem in terms of the element life, and there is a problem that the adhesion strength is weak and the film is easily peeled off simply by providing the SiNx film as the protective film.

本発明は上記課題を解決するためのもので、外部量子
効率を向上させるとともに、素子寿命を伸ばすことがで
きる化合物半導体装置及びその表面処理加工方法を提供
することを目的とする。The present invention has been made to solve the above problems, and has as its object to provide a compound semiconductor device capable of improving external quantum efficiency and extending the life of an element, and a surface treatment method thereof.

〔課題を解決するための手段〕[Means for solving the problem]

本発明はIII−Ｖ族化合物半導体の表面に凹凸を形成
し、さらに凹凸表面上にSiNx膜を形成することを特徴と
するものである。The present invention is characterized in that irregularities are formed on the surface of a III-V compound semiconductor, and a SiNx film is formed on the irregular surface.

第１図は本発明によるヘテロ接合高輝度発光LEDの構
造の一例を示す図で、１は裏電極、２はＰクラッド層、
３はｐアクティブ層、４はｎクラッド層、５は表電極、
６は凹凸、７はSiNx膜である。FIG. 1 is a view showing an example of the structure of a hetero-junction high-brightness light emitting LED according to the present invention, wherein 1 is a back electrode, 2 is a P cladding layer,
3 is a p active layer, 4 is an n clad layer, 5 is a front electrode,
Reference numeral 6 denotes irregularities, and reference numeral 7 denotes a SiNx film.

第１図に例として示すAlGaAs半導体からなる発光ダイ
オードは、ｐアクティブ層３をクラッド層２、４でサン
ドイッチし、その表と裏面にそれぞれ電極１、５を形成
する。これは、例えば電極を蒸着後、熱処理して半導体
との界面を合金化することにより行う。次に、電極を除
く発光ダイオードの全面に、サンドブラストや微粉末を
吹きつける等の物理的方法、またはエッチング等の化学
的方法で凹凸６を形成する。こうして、凹凸をつけた
後、その表面上に減圧CVD法、プラズマCVD法、スパッタ
リング法等によりSiNx膜を保護膜として形成する。In the light-emitting diode made of an AlGaAs semiconductor shown as an example in FIG. 1, a p-active layer 3 is sandwiched between cladding layers 2 and 4, and electrodes 1 and 5 are formed on the front and back surfaces, respectively. This is performed, for example, by depositing an electrode and then heat-treating to alloy the interface with the semiconductor. Next, unevenness 6 is formed on the entire surface of the light emitting diode excluding the electrodes by a physical method such as sandblasting or spraying fine powder, or a chemical method such as etching. After forming the irregularities in this manner, a SiNx film is formed as a protective film on the surface by a reduced pressure CVD method, a plasma CVD method, a sputtering method, or the like.

こうして作製した発光ダイオードについて、実際に駆
動して得られる輝度のヒストグラムを求めたところ、第
２図のような結果が得られ、同様に凹凸のみ設けたも
の、或いはSiNx膜のみ形成したものについて測定したと
ころ第３図に示す結果が得られた。なお、図において横
軸は輝度（任意単位）、縦軸は個数（ただし、比較し易
いように最大値で規格化）である。A histogram of the luminance obtained by actually driving the light emitting diode thus obtained was obtained. As a result, a result as shown in FIG. 2 was obtained. As a result, the result shown in FIG. 3 was obtained. In the figure, the horizontal axis represents luminance (arbitrary unit), and the vertical axis represents the number (however, standardized with a maximum value for easy comparison).

本発明においては平均輝度1929が得られたのに対し
て、従来のものは1373であり、本発明により輝度を向上
させることができる。In the present invention, an average luminance of 1929 was obtained, whereas the conventional one is 1373, and the luminance can be improved by the present invention.

次に、SiNx膜のみ形成したLED、表面に凹凸のみ設け
たLED、本発明によるLEDについてライフ試験を行った結
果を第１表に示す。Next, Table 1 shows the results of life tests performed on the LED having only the SiNx film, the LED having only the unevenness on the surface, and the LED according to the present invention.

表中、テストＡはステップ１（温度85℃、相対湿度95
％の環境下で、駆動電流直流20mAで12時間駆動）、ステ
ップ２（温度−20℃、相対湿度100％の環境下で、駆動
電流直流20mAで12時間駆動）について、ステップ１＋ス
テップ２を３回繰り返したものであり、テストＢはテス
トＡを行った後、さらにステップ３（温度85℃、相対湿
度95％の環境下で、駆動電流直流20mAで４時間駆動）、
ステップ４（温度−20℃、相対湿度100％の環境下で、
駆動電流直流20mAで４時間駆動）について、ステップ３
＋ステップ４を30回繰り返したものであり、表中の数値
は輝度残存率（最初に測定した時の値に対する比率）を
示している。 In the table, test A is step 1 (temperature 85 ° C, relative humidity 95
% For 12 hours at a drive current of 20 mA) and Step 2 (12 hours of drive for 20 hours at a drive current of 20 mA in an environment of a temperature of -20 ° C and a relative humidity of 100%). The test B is the test A, and after the test A is performed, the step 3 is further performed (driving for 4 hours at a driving current of 20 mA DC in an environment of a temperature of 85 ° C. and a relative humidity of 95%),
Step 4 (In an environment with a temperature of -20 ° C and a relative humidity of 100%,
Step 4) (drive current 20mA DC for 4 hours)
+ Step 4 was repeated 30 times, and the numerical values in the table indicate the luminance remaining ratio (ratio to the value measured first).

第１表から分かるように、本発明によるものは輝度残
存率が大きく、寿命が大幅に延びることが分かる。As can be seen from Table 1, it can be seen that the device according to the present invention has a large luminance retention rate and a long life.

なお、凹凸の大きさは光を散乱し、かつSiNx膜の付着
強度が保てればよく、特に限定なないが、好ましくは凹
凸の谷から谷、または山から山の距離は0.1μｍ以上で
ある。The size of the unevenness is not particularly limited as long as the light can be scattered and the adhesion strength of the SiNx film can be maintained.

〔作用〕[Action]

本発明は、III−Ｖ族化合物半導体表面に凹凸を形成
して全反射を防止するとともに、凹凸表面上にSiNx膜を
形成したものであり、表面凹凸により外部量子効率を向
上させることができ、さらに凹凸の上にSiNx膜を設けた
のでその付着強度が増大し、その結果SiNx膜が剥がれる
ことがなくなり、耐湿性が向上し、酸化を防止してLED
の寿命を延ばすことができる。The present invention forms irregularities on the surface of the group III-V compound semiconductor to prevent total reflection, and forms a SiNx film on the irregularities.The surface irregularities can improve external quantum efficiency. Furthermore, since the SiNx film is provided on the irregularities, the adhesion strength increases, and as a result, the SiNx film does not come off, improving the moisture resistance and preventing oxidation.
Life can be extended.

〔実施例〕〔Example〕

以下、実施例を説明する。 Hereinafter, examples will be described.

電極を蒸着後、熱処理して合金電極を形成したAlGaAs
−LEDウエハを過酸化水素水：アンモニア＝1:1に混合し
た液に１分間つけた後、30秒間水洗し、さらに３％HCl
水溶液に５分間つけてエッチングし、15分間の水洗をお
こないメチルアルコールについて中和し乾燥させた。こ
のようにして凹凸を形成したウエハ面上にPCVD法により
SiNx膜を約3000Å製膜した。凹凸処理により外部量子効
率は約40％向上し、SiNx膜の形成で3000時間のライフテ
ストにも輝度の劣化が見られず良好であった。AlGaAs deposited electrode and heat treated to form alloy electrode
-An LED wafer is immersed in a liquid mixture of hydrogen peroxide solution: ammonia = 1: 1 for 1 minute, washed with water for 30 seconds, and further added with 3% HCl.
The resultant was dipped in an aqueous solution for 5 minutes, etched, washed with water for 15 minutes, neutralized with methyl alcohol, and dried. By the PCVD method on the wafer surface with the irregularities formed in this way
About 3000 mm of SiNx film was formed. The external quantum efficiency was improved by about 40% due to the unevenness treatment, and the formation of the SiNx film showed no deterioration in luminance even in a 3000-hour life test, which was favorable.

〔発明の効果〕〔The invention's effect〕

以上のように本発明によれば、III−Ｖ族化合物半導
体表面を凹凸処理することによって光の取り出し効率を
上げ、その凹凸表面上にSiNx膜を形成することで膜自体
の付着強度が高められる。これによってSiNx膜の剥がれ
がなくなり、耐湿性が格段に向上し、AlGaAsの酸化によ
るLEDチップの劣化が逓減されて寿命特性を向上させる
ことができる。As described above, according to the present invention, the light extraction efficiency is increased by subjecting the III-V compound semiconductor surface to unevenness, and the adhesion strength of the film itself is increased by forming a SiNx film on the uneven surface. . As a result, the SiNx film does not peel off, the moisture resistance is remarkably improved, the deterioration of the LED chip due to the oxidation of AlGaAs is gradually reduced, and the life characteristics can be improved.

【図面の簡単な説明】[Brief description of the drawings]

第１図は本発明の高輝度発光LEDの構造の一例を示す
図、第２図は本発明のLEDについての輝度ヒストグラム
を示す図、第３図は従来のLEDについての輝度ヒストグ
ラムを示す図である。 １…裏電極、２…Ｐクラッド層、３…Ｐアクティブ層、
４…Ｎクラッド層、５…表電極、６…凹凸、７…SiNx
膜。FIG. 1 is a diagram showing an example of the structure of the high-brightness light emitting LED of the present invention, FIG. 2 is a diagram showing a luminance histogram of the LED of the present invention, and FIG. 3 is a diagram showing a luminance histogram of a conventional LED. is there. 1. Back electrode, 2. P cladding layer, 3. P active layer
4 N cladding layer, 5 front electrode, 6 unevenness, 7 SiNx
film.

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−20383（ＪＰ，Ａ) 特開 昭63−27072（ＪＰ，Ａ) 特公 昭52−38397（ＪＰ，Ｂ２) ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-20383 (JP, A) JP-A-63-27072 (JP, A) JP-B-52-38397 (JP, B2)

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】混晶比ｘが０＜ｘ＜１であるAlxGa1-xAs半
導体であって、表面に凹凸が形成されるとともに、凹凸
表面上にSiNx膜が形成されていることを特徴とする化合
物半導体装置。1. An Al x Ga 1 -xAs semiconductor having a mixed crystal ratio x of 0 <x <1, wherein irregularities are formed on the surface and a SiNx film is formed on the irregular surface. A compound semiconductor device characterized by the above-mentioned. 【請求項２】混晶比ｘが０＜ｘ＜１であるAlxGa1-xAs半
導体の表面処理加工方法であって、物理的または化学的
方法により表面に凹凸を形成後、減圧CVD法、プラズマC
VD法、またはスパッタリング法により凹凸表面上にSiNx
膜を形成したことを特徴とする表面処理加工方法。2. A mixed crystal ratio x is 0 <a Al x Ga 1-x As semiconductor surface treatment method is a x <1, after forming a physical or irregularities on the surface by chemical methods, low pressure CVD Method, plasma C
SiNx on uneven surface by VD method or sputtering method
A surface treatment method comprising forming a film.
JP15933089A 1989-06-21 1989-06-21 Compound semiconductor device and surface treatment method thereof Expired - Fee Related JP2953468B2 (en)

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US07/546,813 US5040044A (en) 1989-06-21 1990-06-20 Compound semiconductor device and method for surface treatment
KR1019900009103A KR0179952B1 (en) 1989-06-21 1990-06-20 Compound semiconductor device and method for surface treatment
DE69008931T DE69008931T2 (en) 1989-06-21 1990-06-21 Compound semiconductor device and method for its surface treatment.
EP90306788A EP0404565B1 (en) 1989-06-21 1990-06-21 Compound semiconductor device and method of surface treatment of such a device

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KR910002020A (en) 1991-01-31
US5040044A (en) 1991-08-13
EP0404565B1 (en) 1994-05-18
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JPH0324771A (en) 1991-02-01

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